Summary

[0:00] Black.
[0:01] A grainy, black-and-white image of what looks like a window appears. Noise is heard.
[0:04] Cut to a window outside of a bedroom. Tim walks in, looking ill and unhappy.
[0:08] Tim is shown sitting on his bed and puts his head in his hands.
[0:14] Through some of the distortion, an Operator Mark appears over Tim's head briefly.
[0:20] He grabs a pill bottle from the side dresser and briefly examines them before taking some.
[0:26] Tim sits on his bed and stares straight ahead before looking right towards the window.
[0:33] He gets up and it cuts to him standing at the window seen at the beginning of the video, his figure silhouetted and his back to the camera.
[0:38] For a very short moment, an image of the mask pops up and overlays on Tim’s face.
[0:39] Tim continues to stand at the window and look out of it.
[0:42] The video tears and cuts to black.

Main Theories and Observations

At the 0:14 mark, an Operator Mark appears very faintly through distortion on Tim's head. The image of this can be found here.
At the 0:38 mark, The Mask appears over the screen and very briefly overlays on Tim’s face. The image of this can be found here.
At the 0:39 mark, before The Mask disappears, it moves from Tim's face and fills up the rest of the window. The image of this can be found here.
On Jay's twitter, an Image was posted a day before with the caption "x". The image shown was a shot of the video of Tim looking out the window. This video was then posted to the twitter with the caption "0". If you put the two captions together (0+x) you get the Operator symbol

Further Speculation

After the events of Entry 61, it can be deduced that this is TTA filming through Tim's window. When Tim sees him, he backs away from the window, but continues filming, which is how we end up with the creepy Tim silhouette at the end. It seems fairly obvious from this and the medical documents that Tim is way more involved in this than we ever suspected, even more so than Alex was. The SIR